A variant of eccrine spiradenoma which can be multiple on the scalp and can coalesce to form a 'Turban' tumour. In pathology, a cylindroma is a tumour with nests of cells that resemble a cylinder in cross section. Types include: * Dermal eccrine cylindroma, a benign tumour of the skin * Adenoid cystic carcinoma, a malignant tumour of the salivary gland